I drink a lot of green tea, as well. My favorites are the flavored blends. I love the citrus and the peach (Madame Butterfly) in particular.
I'm not sure I could respond to your question about the loo! But you gave me a smile. Having 2-3 cups a day ... sounds to me like it would be fine. (Of course, I'm no doc) And tea has great health benefits, based on what I've read.
So if I were you, I'd go ahead and sip away and enjoy!
